Bumping around Europe to see old-world cities, museums and the like is always fun. But sometimes I like to have a mission, a journey, even a quest to guide my travels. Ten years ago, I tried to extend a business trip to Frankfurt, Germany with a side-trip to the Aachen area to the West where my uncle Eddie was killed during World War II, and then to his grave in Belgium; I had never been. But my trip was interrupted by the terrorist attacks on 9/11 back in the U.S. On the tenth anniversary of the attacks, I decided it was time to take care of unfinished business.